We demonstrate a versatile, bottom-up method of forming metal and semiconducting nanoparticles by exposing precursor metal-organic frameworks (MOFs) to an electron beam. Using a transmission electron microscope to initiate and observe growth, we show that the composition, size, and morphology of the nanoparticles are determined by the chemistry and structure of the MOF, as well as the electron beam properties. Indium, copper, and zinc oxide particles were produced with narrow and tunable size distributions comparable to those obtained from state-of-the-art methods. This method represents a first step toward fabrication of nanoscale heterostructures using the highly controlled environment of the MOF pores as a scaffold or template.
Pub Type: Journals
Metal organic framework, MOF, transmission electron microscope, nanoparticle, nanocrystal, ZnO, Cu